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bekas [8.4K]
3 years ago
14

Need Help With Physical Ed

Physics
2 answers:
Dimas [21]3 years ago
8 0

which of the following is not a barrier to physical activity it is fear of injury I think.

mote1985 [20]3 years ago
5 0
I believe it’s fear of injury
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Determine the magnitude of the resultant force acting on a 1.5 −kg particle at the instant t=2 s, if the particle is moving alon
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Answer:

F = 63N

Explanation:

M= 1.5kg , t= 2s, r = (2t + 10)m and

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magnitude of the resultant force acting on 1.5kg = ?

Force acting on the mass =

∑Fr =MAr

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∑Fθ = MAθ = M(d²θ/dr + 2dθ/dr) ......... equation (ii)

The horizontal path is defined as

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dr/dt = 2, d²r/dt² = 0

Angle Θ is defined by

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at t = 2

r = (2t + 10) = (2*(2) +10) = 14

but dr/dt = 2m/s and d²r/dt² = 0m/s

θ = (1.5(2)² - 6(2) ) = -6rads

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substituting equation i into equation ii,

Fr = M(d²r/dt² + rdθ/dt) = 1.5 (0-0)

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∑F = 1.5(14*3+0) = 63N

F = √(Fr² +FΘ²) = √(0² + 63²) = 63N

7 0
3 years ago
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A 5.6 g marble is fired vertically upward using a spring gun. The spring must be compressed 6.4 cm if the marble is to just reac
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